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/*
Copyright (C) 2025 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include <dcp/openjpeg_image.h>
#include <dcp/j2k_transcode.h>
#include <dcp/raw_convert.h>
#include <dcp/types.h>
#include <fmt/format.h>
#include <boost/algorithm/string.hpp>
#include <cerrno>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <fcntl.h>
#include <semaphore.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
using std::string;
using std::vector;
auto constexpr CLIENT_TO_GROK_MESSAGE = "Global\\client_to_grok_message";
auto constexpr GROK_TO_CLIENT_MESSAGE = "Global\\grok_to_client_message";
auto constexpr GROK_UNCOMPRESSED_BUFFER = "Global\\grok_uncompressed_buf";
auto constexpr GROK_COMPRESSED_BUFFER = "Global\\grok_compressed_buf";
auto constexpr CLIENT_SENT = "Global\\client_sent";
auto constexpr CLIENT_RECEIVE_READY = "Global\\client_receive_ready";
auto constexpr GROK_SENT = "Global\\grok_sent";
auto constexpr GROK_RECEIVE_READY = "Global\\grok_receive_ready";
auto constexpr GROK_BATCH_COMPRESS_INIT = "GRK_MSGR_BATCH_COMPRESS_INIT";
auto constexpr GROK_PROCESSED_COMPRESSED = "GRK_MSGR_BATCH_PROCESSSED_COMPRESSED";
auto constexpr GROK_PROCESSED_UNCOMPRESSED = "GRK_MSGR_BATCH_PROCESSED_UNCOMPRESSED";
auto constexpr GROK_SUBMIT_COMPRESSED = "GRK_MSGR_BATCH_SUBMIT_COMPRESSED";
auto constexpr GROK_SUBMIT_UNCOMPRESSED = "GRK_MSGR_BATCH_SUBMIT_UNCOMPRESSED";
auto constexpr GROK_SHUTDOWN = "GRK_MSGR_BATCH_SHUTDOWN";
auto constexpr MESSAGE_BUFFER_LEN = 256;
int client_to_grok_message_fd;
char* client_to_grok_message_buffer;
int grok_to_client_message_fd;
char* grok_to_client_message_buffer;
int grok_uncompressed_fd;
char* grok_uncompressed_buffer;
int grok_compressed_fd;
char* grok_compressed_buffer;
sem_t* client_receive_ready;
sem_t* grok_sent;
static void init_shm(char const* name, int length, int* fd, char** buffer)
{
*fd = shm_open(name, O_CREAT | O_RDWR, 0666);
if (*fd < 0) {
std::cerr << "shm_open " << name << " failed: " << strerror(errno) << "\n";
exit(EXIT_FAILURE);
}
if (ftruncate(*fd, length) < 0) {
std::cerr << "ftruncate failed: " << strerror(errno) << "\n";
exit(EXIT_FAILURE);
}
*buffer = static_cast<char*>(mmap(0, length, PROT_WRITE, MAP_SHARED, *fd, 0));
if (*buffer == reinterpret_cast<void*>(-1)) {
std::cerr << "mmap failed: " << strerror(errno) << "\n";
close(*fd);
shm_unlink(name);
exit(EXIT_FAILURE);
}
}
static void send(char const* message)
{
if (sem_wait(client_receive_ready)) {
std::cout << "sem_wait failed\n";
exit(EXIT_FAILURE);
}
strcpy(grok_to_client_message_buffer, message);
if (sem_post(grok_sent)) {
std::cout << "sem_post failed\n";
exit(EXIT_FAILURE);
}
}
int main(int argc, char* argv[])
{
std::cout << "Mock Grok starting.\n";
if (argc < 3) {
std::cerr << "Missing parameter.\n";
exit(EXIT_FAILURE);
}
vector<string> parameters;
boost::algorithm::split(parameters, argv[2], boost::is_any_of(","));
std::cout << "Parameters: " << argv[2] << "\n";
if (parameters.size() != 6) {
std::cerr << "Unexpected parameter count.\n";
exit(EXIT_FAILURE);
}
int const width = dcp::raw_convert<int>(parameters[1]);
int const stride = dcp::raw_convert<int>(parameters[2]);
int const height = dcp::raw_convert<int>(parameters[3]);
int const samples_per_pixel = dcp::raw_convert<int>(parameters[4]);
int const depth = dcp::raw_convert<int>(parameters[5]);
int const compressed_frame_size = 10 * 1024 * 1024;
int const num_frames = 16;
init_shm(CLIENT_TO_GROK_MESSAGE, MESSAGE_BUFFER_LEN, &client_to_grok_message_fd, &client_to_grok_message_buffer);
init_shm(GROK_TO_CLIENT_MESSAGE, MESSAGE_BUFFER_LEN, &grok_to_client_message_fd, &grok_to_client_message_buffer);
init_shm(
GROK_UNCOMPRESSED_BUFFER,
width * height * samples_per_pixel * num_frames * 2,
&grok_uncompressed_fd,
&grok_uncompressed_buffer
);
init_shm(GROK_COMPRESSED_BUFFER, compressed_frame_size * num_frames, &grok_compressed_fd, &grok_compressed_buffer);
auto dummy = std::make_shared<dcp::OpenJPEGImage>(dcp::Size{width, height});
for (int i = 0; i < (width * height); ++i) {
dummy->data(0)[i] = rand() % 4096;
dummy->data(1)[i] = rand() % 4096;
dummy->data(2)[i] = rand() % 4096;
}
auto j2k = dcp::compress_j2k(dummy, 50000000, 24, false, false);
if (j2k.size() > compressed_frame_size) {
std::cerr << "Dummy frame is too big.\n";
exit(EXIT_FAILURE);
}
for (auto i = 0; i < num_frames; ++i) {
memcpy(grok_compressed_buffer + i * compressed_frame_size, j2k.data(), j2k.size());
}
auto client_sent = sem_open(CLIENT_SENT, O_CREAT, 0666, 0);
if (client_sent == SEM_FAILED) {
std::cerr << "sem_open failed for " << CLIENT_SENT << "\n";
exit(EXIT_FAILURE);
}
client_receive_ready = sem_open(CLIENT_RECEIVE_READY, O_CREAT, 0666, 1);
if (client_receive_ready == SEM_FAILED) {
std::cerr << "sem_open failed for " << CLIENT_SENT << "\n";
exit(EXIT_FAILURE);
}
grok_sent = sem_open(GROK_SENT, O_CREAT, 0666, 0);
if (grok_sent == SEM_FAILED) {
std::cerr << "sem_open failed for " << GROK_SENT << "\n";
exit(EXIT_FAILURE);
}
auto grok_receive_ready = sem_open(GROK_RECEIVE_READY, O_CREAT, 0666, 1);
if (grok_receive_ready == SEM_FAILED) {
std::cerr << "sem_open failed for " << GROK_RECEIVE_READY << "\n";
exit(EXIT_FAILURE);
}
std::cout << "Mock Grok ready.\n";
auto init = fmt::format(
"{},{},{},{},{},{},{},{}",
GROK_BATCH_COMPRESS_INIT,
width,
stride,
height,
samples_per_pixel,
depth,
compressed_frame_size,
num_frames
);
send(init.c_str());
int frames = 0;
while (true) {
if (sem_wait(client_sent)) {
std::cout << "sem_wait failed\n";
exit(EXIT_FAILURE);
}
vector<string> parameters;
boost::algorithm::split(parameters, client_to_grok_message_buffer, boost::is_any_of(","));
if (parameters[0] == GROK_SUBMIT_UNCOMPRESSED) {
if (parameters.size() != 3) {
std::cerr << "Unexpected parameter count in " << client_to_grok_message_buffer << "\n";
exit(EXIT_FAILURE);
}
++frames;
int const dcp_frame = dcp::raw_convert<int>(parameters[1]);
int const frame_id = dcp::raw_convert<int>(parameters[2]);
send(fmt::format("{},{}", GROK_PROCESSED_UNCOMPRESSED, frame_id).c_str());
send(fmt::format("{},{},{},{}", GROK_SUBMIT_COMPRESSED, dcp_frame, frame_id, j2k.size()).c_str());
} else if (parameters[0] == GROK_SHUTDOWN) {
break;
}
if (sem_post(grok_receive_ready)) {
std::cout << "sem_post failed\n";
exit(EXIT_FAILURE);
}
}
sem_close(client_sent);
sem_close(client_receive_ready);
sem_close(grok_sent);
sem_close(grok_receive_ready);
sem_unlink(CLIENT_SENT);
sem_unlink(CLIENT_RECEIVE_READY);
sem_unlink(GROK_SENT);
sem_unlink(GROK_RECEIVE_READY);
return 0;
}
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